<template>
  <div class="shopcart">
    <div class="content">
      <div class="content-left">
        <div class="logo-wrapper">
          <div class="logo" :class="{'hightlight':totalPrice>0}">
            <i class="icon-shopping_cart" :class="{'hightlight':totalPrice>0}"></i>
          </div>
          <div class="num" v-show="totalCount>0">{{totalCount}}</div>
        </div>
        <div class="price" :class="{'hightlight':totalPrice>0}">￥{{totalPrice}}</div>
        <div class="desc">另需要配送费￥{{deliveryPrice}}元</div>
      </div>
      <div class="content-right">
        <div class="pay" :class="payClass">
          {{payDesc}}
        </div>
      </div>
      <div class="ball-content">
        <transition-group
          @before-enter="beforeEnter"
          @enter="enter"
          @after-enter="afterEnter"
        >
          <div class="ball" v-show="ball.show" v-for="(ball,index) in balls" :key="index">
            <div class="inner inner-hook"></div>
          </div>
        </transition-group>
      </div>
    </div>
  </div>
</template>

<script type="text/ecmascript-6">
  import {mapActions} from 'vuex'
  export default {
    props: {
      selectFoods: {
        type: Array,
        default () {
          return []
        }
      },
      deliveryPrice: {
        type: Number,
        default: 0
      },
      minPrice: {
        type: Number,
        default: 0
      }
    },
    data () {
      return {
        balls: [
          {show: false},
          {show: false},
          {show: false},
          {show: false},
          {show: false}
        ],
        dropBalls: []
      }
    },
    computed: {
      totalPrice () {
        let total = 0
        this.selectFoods.forEach((food) => {
          total += food.price * food.count
        })
        return total
      },
      totalCount () {
        let count = 0
        this.selectFoods.forEach((food) => {
          count += food.count
        })
        return count
      },
      payDesc () {
        if (this.totalPrice === 0) {
          return `￥${this.minPrice}元起送`
        } else if (this.totalPrice < this.minPrice) {
          let diff = this.minPrice - this.totalPrice
          return `还差${diff}元起送`
        } else {
          return '去结算'
        }
      },
      payClass () {
        if (this.totalPrice < this.minPrice) {
          return 'not-enough'
        } else {
          return 'enough'
        }
      }
    },
    created () {
      this.$store.state.balls = this.balls
      this.$store.state.dropBalls = this.dropBalls
    },
    methods: {
      beforeEnter (el) {
        console.info(el)
        console.info('beforeEnter')
        let count = this.balls.length
        while (count--) {
          let ball = this.balls[count]
          if (ball.show) {
            console.info(ball.el)
            let x = ball.el.clientLeft - 32
            let y = -(window.innerHeight - ball.el.clientTop - 22)
            el.style.display = ''
            el.style.webkitTransfrom = `translate3d(0,${y},0)`
            el.style.transfrom = `translate3d(0,${y},0)`
            let inner = el.getElementsByClassName('inner-hook')[0]
            console.info(inner.style)
            inner.style.webkitTransfrom = `translate3d(${x},0,0)`
            inner.style.transfrom = `translate3d(0,${x},0)`
          }
        }
      },
      enter (el) {
        console.info(el)
        console.info('enter')
        /* eslint-disable no-unused-vars */
        let rf = el.offestHeight
        this.$nextTick(() => {
          el.style.display = ''
          el.style.webkitTransfrom = 'translate3d(0,0,0)'
          el.style.transfrom = 'translate3d(0,0,0)'
          let inner = el.getElementsByClassName('inner-hook')[0]
          inner.style.webkitTransfrom = 'translate3d(0,0,0)'
          inner.style.transfrom = 'translate3d(0,0,0)'
        })
      },
      afterEnter (el) {
        console.info(el)
        console.info('afterEnter')
        let ball = this.dropBalls.shift()
        if (ball) {
          ball.show = false
          el.style.display = 'none'
        }
      },
      ...mapActions([
        'drop'
      ])
    }

  }
</script>

<style lang="stylus" rel="stylesheet/stylus">
  .shopcart
    position fixed
    left 0
    bottom 0
    z-index 50
    width 100%
    height 48px
    .content
      display flex
      background #141d27
      font-size 0
      color rgba(255, 255, 255, 0.4)
      .content-left
        flex 1
        .logo-wrapper
          display inline-block
          vertical-align top
          position relative
          top -10px
          margin 0 12px
          padding 6px
          width 56px
          height 56px
          box-sizing border-box
          border-radius 50%
          background #141d27
          .logo
            width 100%
            height 100%
            border-radius 50%
            text-align center
            background #2b343c
            &.hightlight
              background rgb(0, 168, 282)
            .icon-shopping_cart
              font-size 24px
              line-height 44px
              color #80858a
              &.hightlight
                color #fff
          .num
            position absolute
            top 0
            right 0
            width 24px
            height 16px
            line-height 16px
            text-align center
            border-radius 16px
            font-size 9px
            color white
            font-weight 700
            background rgb(240, 20, 20)
            box-shadow 0 4px 8px 0 rgba(0, 0, 0, 0.4)
        .price
          display inline-block
          vertical-align top
          margin-top 12px
          line-height 24px
          padding-right 12px
          box-sizing border-box
          border-right 1px solid rgba(255, 255, 255, 0.1)
          font-size 16px
          font-weight 700
          &.hightlight
            color #fff
        .desc
          display inline-block
          vertical-align top
          margin 12px 0 0 12px
          line-height 24px
          font-size 10px
      .content-right
        flex 0 0 105px
        width 105px
        .pay
          height 48px
          line-height 48px
          text-align center
          font-size 12px
          font-weight 700
          background #2b333b
          &.not-enough
            background #2b333b
          &.enough
            background #00b43c
            color #fff
    .ball-content
      .ball
        position fixed
        left 32px
        bottom:22px
        z-index 200
        &.v-enter-active, &.v-enter-to
          // transition: all 0.4s cubic-bezier(0.49, -0.29, 0.75, 0.41)
          transition all 2s
          .inner
            width 16px
            height 16px
            border-radius 50%
            background rgb(0,160,220)
            transition all 0.4s
</style>
